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    Non-rising stem valve assembly and method of replacing a permanent seal
    2.
    发明公开
    Non-rising stem valve assembly and method of replacing a permanent seal 失效
    阀具有茎和用于更换永久密封方法非提升。

    公开(公告)号：EP0377945A1

    公开(公告)日：1990-07-18

    申请号：EP89310712.8

    申请日：1989-10-18

    申请人： ENGINEERED CONTROLS INTERNATIONAL INC.

    发明人： Petersen, James A. ,  Crater, Timothy G.

    IPC分类号： F16K41/18 ,  F16K43/00

    CPC分类号： F16K1/02 ,  F16K43/00 ,  Y10T137/6069 ,  Y10T137/6106

    摘要： A non-rising stem valve assembly (2) is disclosed including a valve body (4) having an inlet (3) and an outlet (5) and is capable of accommodating a non-rising stem valve (14). The non-rising stem valve includes a bonnet member (8) securely attached to the valve body (4) and forms a tubular passageway. A valve stem (14) extends through this tubular passageway and has a lower valve portion (20) axially displacable relative thereto, with the lower valve portion (20) being positioned between the inlet (3) and outlet (5). A retaining ring (16) is provided for securing the valve stem (14) against inward movement relative to the bonnet member (8) and an inwardly projecting flange on the bonnet member is provided for securing the valve stem against outward movement relative to the bonnet member. A packing nut (24) is removably secured to the bonnet member for sealing the valve assembly. The packing nut has an interior surface and an exterior surface with a first O-ring seal (26) being provided on the interior surface and a second O-ring seal (28) being provided on the exterior surface. A third axially displacable seal (36) is provided which rests on an upper surface of the lower valve portion (20) and is axially movable with the lower valve portion. The first and second O-ring seals form permanent seals and seal the valve assembly during normal use, while the third seal forms a temporary seal which may be selectively formed between the valve stem and the bonnet member for temporarily sealing the valve assembly and, allowing the permanent seals to be replaced when necessary without decommissioning the valve assembly. A method of replacing the permanent seals is also disclosed.

    摘要翻译： 一种非提升式杆阀组件（2）是游离缺失盘包括阀主体（4）在具有入口（3）和在出口（5）和能够容纳一个非提升式杆阀（14）的。 所述非提升式杆阀包括阀帽件（8）牢固地连接到所述阀体（4），并形成管状通道。 阀杆（14），通过该管状通道延伸，并且具有一个较低的阀部（20）相对于其轴向displacable，与下阀部（20）的入口之间被定位（3）和出口（5）。 保持环（16）被提供用于固定所述阀杆（14）防止相对于向内移动到机罩构件（8），并在向内突出的阀帽部件上凸缘设置用于固定防止相对向外运动阀杆到机罩 成员。 甲密封螺母（24）可移除地固定到机罩构件用于密封阀组件。 填密螺母具有内表面和与第一O形环密封件（26）外表面上设置的内表面和被设置在外表面上的第二O形环密封件（28）上。 本发明提供一种轴向第三密封displacable（36），其在所述下阀部（20）的上表面上放置并是可轴向移动的与所述下阀部。 第一和第二O形环密封件形成永久密封并在正常使用期间密封阀组件，而第三密封件形成一临时密封装置，它可在阀杆和用于暂时密封阀组件和阀帽件之间选择性地形成，允许 永久密封到而不停止阀组件来更换在必要时。 更换永久密封gibt游离缺失盘的方法。